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authorTilman Sauerbeck <tilman@code-monkey.de>2007-05-13 00:16:36 +0200
committerTilman Sauerbeck <tilman@code-monkey.de>2007-05-13 00:16:36 +0200
commit2ded69bb857ae453d90534203e5857ac3a31a1c3 (patch)
treea4934368f8fd1816b5238cb1cbc3418548229fc1
parent34b3d538061cd648d90eb2bc7284000d980c8d3e (diff)
downloadxorg-lib-libSM-2ded69bb857ae453d90534203e5857ac3a31a1c3.tar.gz
Sanitized hex string conversion in SmsGenerateClientID().
This reduces the size of the DSO by almost 4K and gets rid of 255 relocations on load.
-rw-r--r--src/sm_genid.c61
1 files changed, 16 insertions, 45 deletions
diff --git a/src/sm_genid.c b/src/sm_genid.c
index bf06644..1d1e0a3 100644
--- a/src/sm_genid.c
+++ b/src/sm_genid.c
@@ -78,51 +78,15 @@ in this Software without prior written authorization from The Open Group.
#define TCPCONN
#endif
-
-static char *hex_table[] = { /* for generating client IDs */
- "00", "01", "02", "03", "04", "05", "06", "07",
- "08", "09", "0a", "0b", "0c", "0d", "0e", "0f",
- "10", "11", "12", "13", "14", "15", "16", "17",
- "18", "19", "1a", "1b", "1c", "1d", "1e", "1f",
- "20", "21", "22", "23", "24", "25", "26", "27",
- "28", "29", "2a", "2b", "2c", "2d", "2e", "2f",
- "30", "31", "32", "33", "34", "35", "36", "37",
- "38", "39", "3a", "3b", "3c", "3d", "3e", "3f",
- "40", "41", "42", "43", "44", "45", "46", "47",
- "48", "49", "4a", "4b", "4c", "4d", "4e", "4f",
- "50", "51", "52", "53", "54", "55", "56", "57",
- "58", "59", "5a", "5b", "5c", "5d", "5e", "5f",
- "60", "61", "62", "63", "64", "65", "66", "67",
- "68", "69", "6a", "6b", "6c", "6d", "6e", "6f",
- "70", "71", "72", "73", "74", "75", "76", "77",
- "78", "79", "7a", "7b", "7c", "7d", "7e", "7f",
- "80", "81", "82", "83", "84", "85", "86", "87",
- "88", "89", "8a", "8b", "8c", "8d", "8e", "8f",
- "90", "91", "92", "93", "94", "95", "96", "97",
- "98", "99", "9a", "9b", "9c", "9d", "9e", "9f",
- "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
- "a8", "a9", "aa", "ab", "ac", "ad", "ae", "af",
- "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
- "b8", "b9", "ba", "bb", "bc", "bd", "be", "bf",
- "c0", "c1", "c2", "c3", "c4", "c5", "c6", "c7",
- "c8", "c9", "ca", "cb", "cc", "cd", "ce", "cf",
- "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
- "d8", "d9", "da", "db", "dc", "dd", "de", "df",
- "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7",
- "e8", "e9", "ea", "eb", "ec", "ed", "ee", "ef",
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
- "f8", "f9", "fa", "fb", "fc", "fd", "fe", "ff",
-};
-
-
char *
SmsGenerateClientID (smsConn)
SmsConn smsConn;
{
#if defined(TCPCONN) || defined(STREAMSCONN)
+ static const char hex[] = "0123456789abcdef";
char hostname[256];
- char address[64];
+ char address[64], *addr_ptr = address;
char temp[256];
char *id;
static int sequence = 0;
@@ -153,13 +117,15 @@ SmsGenerateClientID (smsConn)
if (ai->ai_family == AF_INET6) {
unsigned char *cp = (unsigned char *) &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr.s6_addr;
- address[0] = '6'; /* IPv6 address code */
- address[1] = '\0';
+ *addr_ptr++ = '6'; /* IPv6 address code */
for (i = 0 ; i < 16 ; i++) {
- strcat(address, hex_table[cp[i]]);
+ *addr_ptr++ = hex[cp[i] >> 4];
+ *addr_ptr++ = hex[cp[i] & 0x0f];
}
+ *addr_ptr++ = '\0';
+
} else { /* Fall through to IPv4 address handling */
haddr = &((struct sockaddr_in *)ai->ai_addr)->sin_addr;
#else
@@ -193,10 +159,15 @@ SmsGenerateClientID (smsConn)
decimal[3] = atoi (ptr1);
- address[0] = '1';
- address[1] = '\0';
- for (i = 0; i < 4; i++)
- strcat (address, hex_table[decimal[i]]);
+ *addr_ptr++ = '1';
+
+ for (i = 0; i < 4; i++) {
+ *addr_ptr++ = hex[decimal[i] >> 4];
+ *addr_ptr++ = hex[decimal[i] & 0x0f];
+ }
+
+ *addr_ptr++ = '\0';
+
#if defined(IPv6) && defined(AF_INET6)
}
freeaddrinfo(first_ai);